Type-writing machine.



No. 732,340. PATBNTED JUNE so, 1903.

H. (moss & G. J. GRIFFITHS.

TYPE WRITING MACHINE.

APPLICATION rum) MAY 26, 1902.

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-mhrszaqo. PATENTBD JUNE 30, 1903.

H. (moss & G. J. GRIFFITHS.

TYPE WRITING MACHINE.

APPLICATION FILED my 26, 1902. N0 MODEL. 2 sums-sans! 2.

Inventom Harry Group" George far cztlw UNITED STATES Patented June 30,1903.

" PATENT OFFICE.

HARRY CROSS AND GEORGEJ. GRIFFITHS, OF WOODSTOCK, ILLINOIS, ASSIGNORS TOTHE OLIVER TYPEWRITER COMPANY, OF CHICAGO,

ILLINOIS, A CORPORATION OF ILLINOIS.

TYPE-:WRITING MACHINE.

SPECIFICATION forming .part of Letters Patent No. 732,340, dated Juneso, 1903.

Application filed May 26, 1902- Serial No. 108,918. (No model.)

To all whom it may-concern Be it known that we, HARRv-CRoss and GEORGEJ. GRIFFITHS, of Woodstock, in the county of McHenry and State ofIllinois, have invented certain new and useful Improvements inType-Writing Machines; and we do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to improvements in type-writing machines, andrefers more specifically toian improved cushioning device against whichthe type-bars rest when not in use and constructed to cushion the impactof the type-bars as they return to their positions of 'rest and todeaden the noise of the impact.

The invention consists in the matters hereinafter set forth, and moreparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of one side of an Olivertype-writing machine, showing the supporting-frame for one nest of thetype-bars when in their positions of rest. Fig. 2 is a view, partly incentral vertical section and partly in side elevation, of thetype-bar-supporting frame and the cushioning device. Fig. 3 is a faceview of our improved cushioning device for the type-bars removed fromthe machine. Fig. 4 is a side elevation thereof. Fig. 5 is a rear viewof said cushioning device. Fig. 6 is an end view thereof. Fig. 7 is across-section taken on line 7 7 of Fig. 2. Fig. 8 isa view, partly insection and partly in elevation, of a modified form of thetype-bar-supporting frame and cushioning device. Fig. 9 is a rearelevation of the part of the supporting-frame to which the cushioningdevice is attached, said part being removed from themachine. Fig. 10 isa rear elevation of the cushioning device removed from the m'achinelFig. 11'- is a front elevation thereof. elevation of said parts.

In said drawings only such parts of the type-writing machine are shownas are essential to an understanding of the application of our inventionto a type-writing machine.

Fig. 12 isanend present invention.

As shown in Fig. 1, A designates the base of an Oliver type-writingmachine andA' A a plurality of pivoted key-levers which are looselyconnected by links B with the U- shaped type-bars C of the machine. Saidtypebars are pivotally mounted in a supportingframe, of which there aretwo in the completed machine, one located at each side of said machine.Said supportingframe consists of an angular bottom frame C, uprightmembers C a transverse top member C and a centrally-located inclined barC connected at its upper end with the top member C and near its lowerend with a curved brace, C extending upwardly and inwardly from thebottom frame. Said inclined bar C supports the type-bars when the latterare thrown backwardly from the platen or when in their positions ofrest.

On the inner face of the bar C is located the cushioning device, whichconstitutes the Said cushioning device consists of an outer strip C ofleather or like non-resonant material and of durable character, whichdirectly receives the impact of the type-bars, a metallic backing-pieceC ,and an intermediate cushioning-strip C made of felt or likecushioning material. Said backing-strip C is provided at its lower endwith a loop 0, which receives the lower ends of the impact-strip and thecushioning-strips C and C respectively, and said impact and cushioningstrips are secured at their upper ends to said backing-strip by means ofa screwthreaded stud c,extending through said parts and into thebacking-strip. Said cushioning device, consisting of the partsdescribed, is movably connected with the inclined framebar C by means ofscrews 0 said screws extending loosely through a-pertures'in theframe-bar and engaging screw-threaded apertures in the backing-strip ofthe cushioning device, as clearly shown in Fig. 2. Be-

tween said' backing-strip and the-frame bar C are inserted twocushioning-blocks C one located at each end of the plate and on oppositesides of the longitudinal center thereof. Said cushioning-blocks C aidto deaden the impact of the type-bars against the cushion -bars, theloose connection of the screws 0 with the frame-bar O permitting arocking movement of the cushioning device for this purpose.

The impact-strip C is made of durable material, such as leather, toenable it to with stand the wear brought thereon by the striking of thetype-bars thereagainst, while the cushioning-strip placed between thesame and the backing-strip and the cushioning-blocks between thebacking-strip and the yoke bar being made of elastic or yieldingmaterial serve to deaden the noise of the impact and also serve in ameasure to relieve the strain on the pivotal connections of the typebarswith the machine caused by the sudden arrest of the movement of thetype-bars when they strike the cushioning device.

0 0 indicate sleeves of hard rubber or other non-resonant material whichare placed around the said screws 0 and between the same and the holesin the framebar C through which said screws extend. The sleeves thusapplied serve to prevent contact of the studs with the strip, and thusobviate the rattling noise which results from contact of metallic partswith each other, as would occur if the sleeves were absent.

In the form of the device shown in Figs. 8 to 12, inclusive, theinclined bar 0, which supports the cushioning device, is detachablysecured at its upper end by means of a screw 0 to a lug C extendingrearwardly and downwardly from the upper transverse bar 0 of thesupporting-frame, and the curved brace C of said bar is offsettherefrom, as shown in Fig. 9. In this construction thecushioning-blocks 0 located between the bar 0 and the backing-strip C(and which correspond to the cushioning-blocks O of the constructionhereinbefore described) consist of fiat washers, which are locatedpartially between the bar 0 and the backing-strip C and partiallybetween semicircular projections 0 c on the bar and strips,respectively, and are held in place by screw-bolts 0 extending throughthe washers and said projections. The screw-bolts c correspond with thebolts 0 hereinbefore described, and serve not only to hold thecushioning-blocks G in place, but to secure the cushioning device as awhole to the strip or bar 0 The bolts 0 are surrounded by non-resonantsleeves c to prevent rattling of the bolts against the bar 0 The lowerend of the backing-strip is provided with a loop 0 which receives thelower ends of the cushioning and impact strips C and C", respectively,in a manner similar to the construction hereinbefore described.

It is obvious that changes may be made in the details of constructionabove described without departing from the spirit of our infor looselyconnecting said cushioning device with said supporting-frame, and acushioning-block interposed between the cushioning device and frame.

2. The combination with a type-bar-supporting frame, of a cushioningdevice, comprising a backing-strip, an impact-strip, a cushioning-stripbetween the impact-strip and the backing-strip, and cushioning-blocksinterposed between the backing-strip and the frame at the ends of thesaid strip, one on each side of its longitudinal center.

3. The combination with a type-bar-supporting frame, of a cushioningdevice, comprising a backing-strip, an impact-strip, a cushioning-stripbetween the impact-strip and the backing-strip, cushioning-blocksinposed between the backing-strip and the frame at the ends of the saidstrip, one on each side ofits longitudinal center, and screwstuds forconnecting the backing-strip with the frame and loosely connected withthe frame.

4. The combination with a type-bar-supporting frame, of a cushioningdevice comprising a backing-strip, an impact-strip, a cushioning-stripbetween the impact-strip and the backing-strip, and studs for connectingthe backing-strip with the frame and extending through holes in theframe, said studs being provided with non-resonant sleeves.

5. The combination with a type-bar-supporting frame, of a cushioningdevice comprising a backing-strip, an impact-strip, a cushioning-stripbetween the backing and impact. strips, cushion-blocks interposedbetween the ends of said backing-strip and the frame and screwsextending through said cushioning-blocks and attaching the backing-stripto the machine-frame.

6. The combination with a type-bar-supporting frame, of a cushioningdevice comprising a backing-strip, an impact-strip, a cushioning-stripbetween the backing and impact strips, and cushioning-blocks interposedbetween lateral projections on the backingstrip and the frame.

In testimony that we claim the foregoing as our invention we affix oursignatures, in presence of two witnesses, this 12th day of April, A. D.1902.

HARRY CROSS. GEORGE J. GRIFFITHS.

Witnesses:

S. A. GREENLEAF, B. C. YOUNG.

